Rough Set Theory and Dempster-Shafer Theory

The first work introducing relations between rough set theory and
Dempster - Shafer theory, through - then new - ideas of qualities of
lower and upper approximations of a set, was an unpublished paper from
1987, circulated among rough set community, entitled Rough - set and
Dempster - Shafer approaches to knowledge acquisition under uncertainty
- a comparison and authored by Jerzy W. Grzymala-Busse.

The ideas were first implemented by Hang Cheng in 1992 in a system that
was able to compute, among others, belief and plausibility for a given
input table and create an input table for a given basic probability
assignment. The system was then improved, consecutively, by Lili Wen
and Mark D. Seaborn.